Preface
The TFS450 reverse osmosis filtration system requires three elements for most applications.
1. Potable inlet water with an average supply pressure of at least 70 psi (483 kPa). This is necessary in order to achieve
the TFS450 daily production rating of 300 gallons per day at 70 psi (483 kPa) and 77°F (25°C) without blending. (See Figure 1).
If the inlet supply pressure average is less, it is recommended to install the TFS450-BP Water Booster Pump (Part Number 62339-01).
(Sold Separately)
2. The TFS450 reverse osmosis (RO) filtration system with two RO membrane cartridges and head assemblies bracketed for a pre-
filter (required) and a final (post) filter (required for beverage applications). The System includes a precision blending valve that allows
adjustment of the mineral content of the product water from 10% (with no blending) to about 50% of the mineral content of the inlet
water. A battery powered built-in TDS (Total Dissolved Solids) meter provides monitoring of the product water. A pressure regulator
opens a bypass line and thus maintains continuous flow to downstream equipment at times of high demand. All product waters (RO
water, blended water, and bypass water) are filtered only when final (post) filter is used.
3. A pressurized external storage tank with sufficient draw-down to maintain the short-term volume and flow requirements of
all downstream equipment if operated simultaneously. For most foodservice applications, the recommended draw-down tank
volumes are either 10 gallons (37.8 liters), 20 gallons (75.7 liters) or 40 gallons (151.4 liters). (Tanks sold separately)
This manual includes instructions for the installation, Cartridge Change Procedure, and Troubleshooting of the three elements.
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CAUTION
To reduce the risk associated with property damage due to water leakage:
• Read and follow Use Instructions before installation and use of this system.
• Installation and use MUST comply with all state and local plumbing codes.
• Before installation, shut-off main water supply and depressurize and drain pipes.
• Protect from freezing, remove filter cartridge when temperatures are expected to drop below 40° F (4.4° C).
• Do not install systems in areas where ambient temperatures may go above 110° F (43.3° C).
• Do not install on hot water supply lines. The maximum operating water temperature of this filtration system is 100°F (37.8°C).
• Do not install if water pressure exceeds 100 psi (689 kPa). If your water pressure exceeds 80 psi (552 kPa), you must install a pressure limiting
valve. Contact a plumbing professional if you are uncertain how to check your water pressure.
• Do not install where water hammer conditions may occur. If water hammer conditions exist you must install a water hammer arrester. Contact
a plumbing professional if you are uncertain how to check for this condition.
• Where a backflow prevention device is installed on a water system, a device for controlling pressure due to thermal expansion must be
installed.
• Do not use a torch or other high temperature sources near filtration system, cartridges, plastic fittings or plastic plumbing.
• On plastic fittings, never use pipe sealant or pipe dope. Use PTFE thread tape only, pipe dope properties may deteriorate plastic.
• Take care when using pliers or pipe wrenches to tighten plastic fittings, as damage may occur if over tightening occurs.
• Do not install in direct sunlight or outdoors.
• Do not install near water pipes which will be in path of a drilling tool when selecting the position to mount the bracket.
• Mount filter in such a position as to prevent it from being struck by other items used in the area of installation.
• Ensure that the location and fasteners will support the weight of the system when installed and full of water.
• Ensure all tubing and fittings are secure and free of leaks.
• Do not install unit if collet is missing. Contact 3M Purification Inc. if collets are missing from any fittings.
• SHUT OFF FUEL OR ELECTRIC POWER SUPPLY TO WATER HEATER after water is shut off.
• All hydro-pneumatic pressurized tanks must have an appropriate pressure relief valve installed.
• The Pre and Post filter cartridges MUST be replaced every 12 months, at the rated capacity or sooner if a noticeable reduction in flow rate
occurs.
• The RO Membrane MUST be replaced every 24 months, at the rated capacity or sooner if a noticeable reduction in flow rate occurs.
IMPORTANT NOTES
• Failure to follow installation, operation and maintenance instructions may result in leakage and will void warranty.
• Allow minimum of 6” (20 cm) clear space under the assembly to facilitate cartridge changes.
• Install with inlet, outlet, tank and reject ports as labeled. Make sure not to reverse connections.
Cartridge Change Procedure
CAUTION
To reduce the risk associated with property damage due to water leakage:
• The pre and post filter cartridges MUST be replaced every 12 months, at the rated capacity or sooner if a noticeable reduction in flow rate occurs.
• The RO membrane MUST be replaced every 24 months, at the rated capacity or sooner if a noticeable reduction in flow rate occurs.
De-Pressurization Process
1. Turn off the inlet water valve.
2. Close the tank valve.
3. Open the tank sample valve and the outlet sample valve.
4. Wait until water flow from each sample valve stops. Check the post filter pressure gage. Gage should read 0 psi. The system is now
de-pressurized.
IMPORTANT NOTE: The tank will still be under pressure.
Pre-filter Cartridge Replacement Procedure
1. De-pressurize the system, as instructed above.
2. To remove the pre-filter, press the yellow tab and turn the cartridge to the left ¼ turn. Pull down to remove and discard it.
3. Insert a new filter by aligning the tabs with the filter head. Push up to insert and turn to the right ¼ turn.
IMPORTANT NOTE: After installation, the first 10 gallons (38 litters) of product water should be discarded through the tank sample
valve to properly flush the new filter.
Final (Post) Filter Cartridge Replacement
1. De-pressurize the system, as instructed above.
2. To remove the final (post) filter, press the yellow tab and turn to the left (counterclockwise) ¼ turn. Pull down to remove and discard filter.
3. Insert a new filter by aligning the tabs with the filter head. Push up to insert and turn to the right (clockwise) ¼ turn.
IMPORTANT NOTE: After installation, the first 10 gallons (38 litters) of product water should be discarded through the outlet sample
valve to properly flush the new filter.
RO Membrane Replacement Procedure
1. It is recommended that these two cartridges be changed one at a time so that the reject tubing on the bottom is connected
properly and in the same location. Proper performance of the TFS450 system depends upon the correct connections of reject-line
tubing from each of the two RO membranes.
2. De-pressurize the system as instructed above.
3. Remove the left RO membrane first. Rotate the filter ¼ turn to the left and pull down to disconnect the cartridge from the head.
4. Disconnect the reject tubing by pushing in and holding the white collet on the plastic fitting on the bottom of the filter cartridge to
release the tubing.
IMPORTANT NOTE: Do not disconnect the opposite end of this tubing from the system. It should remain connected to the inlet of
the right-hand housing. Discard the used cartridge.
5. Remove the white plug from the plastic fitting on the new cartridge and connect the reject tubing.
6. Insert the new cartridge by aligning the tabs with the filter head. Push up to insert and turn to the right ¼ turn.
7. Repeat the same procedure for RO membrane on the right side. The opposite end of the reject tubing from the system, in this case,
will be connected into the flow control and permeate pump.
IMPORTANT NOTE: The first full tank of water filtered after replacing the RO membrane should be discarded, as it was with the system start-up.
Restarting and Purging the TFS450 System
1. Close the tank and outlet shut-off valves.
2. If you have booster pump, plug in. Open the outlet sample valve.
3. Open the inlet water shut-off valve.
4. Wait for a steady stream of water from the sample valve. This will purge air from the system.
5. Close the sample valve and check for leaks.
6. Open the tank and outlet shut-off valves.
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